#### Thermodynamics

26

The heat supplied to the gaS at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

A. mR(T2 - T1)
B. mcv(T2 - T1)
C. mcp(T2 - T1)
D. mcp(T2+T1)

27

The value of 1 mm of Hg is equal to

A. 1.333 N/m2
B. 13.33 N/m2
C. 133.3 N/m2
D. 1333 N/m2

28

A process, in which the working substance neither receives nor gives out heat to its surroundings during its expansion or compression, is called

A. isothermal process
B. hyperbolic process
D. polytropic process

29

The universal gas constant (or molar constant) of a gas is the product of

A. molecular mass of the gas and the gas constant
B. atomic mass of the gas and the gas constant
C. molecular mass of the gas and the specific heat at constant pressure
D. molecular mass of the gas and the specific heat at constant volume

30

The amount of heat required to raise the temperature of __________ water through one degree is called kilojoule.

A. 1 g
B. 10 g
C. 100 g
D. 1000 g